AutoRestoreSVGState.h

Enable keyboard shortcuts

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef mozilla_image_AutoRestoreSVGState_h

#define mozilla_image_AutoRestoreSVGState_h

#include "mozilla/Attributes.h"

#include "mozilla/AutoRestore.h"

#include "mozilla/SVGContextPaint.h"

#include "mozilla/dom/SVGSVGElement.h"

#include "nsPresContext.h"

#include "SVGDrawingParameters.h"

#include "SVGDocumentWrapper.h"

#include "mozilla/dom/DocumentInlines.h"

#include "mozilla/dom/SVGDocument.h"

#include "mozilla/dom/BrowsingContextBinding.h"

namespace mozilla::image {

class MOZ_STACK_CLASS AutoRestoreSVGState final {

 public:

  AutoRestoreSVGState(const SVGDrawingParameters& aParams,

                      SVGDocumentWrapper* aSVGDocumentWrapper,

                      bool aContextPaint)

      : AutoRestoreSVGState(aParams.svgContext, aParams.animationTime,

                            aSVGDocumentWrapper, aContextPaint) {}

  AutoRestoreSVGState(const SVGImageContext& aSVGContext, float aAnimationTime,

                      SVGDocumentWrapper* aSVGDocumentWrapper,

                      bool aContextPaint)

      : mIsDrawing(aSVGDocumentWrapper->mIsDrawing),

        // Apply any 'preserveAspectRatio' override (if specified) to the root

        // element:

        mPAR(aSVGContext, aSVGDocumentWrapper->GetRootSVGElem()),

        // Set the animation time:

        mTime(aSVGDocumentWrapper->GetRootSVGElem(), aAnimationTime) {

    MOZ_ASSERT(!mIsDrawing.SavedValue());

    MOZ_ASSERT(aSVGDocumentWrapper->GetDocument());

    if (auto* pc = aSVGDocumentWrapper->GetDocument()->GetPresContext()) {

      pc->SetColorSchemeOverride([&] {

        if (auto scheme = aSVGContext.GetColorScheme()) {

          return *scheme == ColorScheme::Light

                     ? dom::PrefersColorSchemeOverride::Light

                     : dom::PrefersColorSchemeOverride::Dark;

        return dom::PrefersColorSchemeOverride::None;

      }());

    aSVGDocumentWrapper->mIsDrawing = true;

    // Set context paint (if specified) on the document:

    if (aContextPaint) {

      MOZ_ASSERT(aSVGContext.GetContextPaint());

      mContextPaint.emplace(aSVGContext.GetContextPaint(),

                            aSVGDocumentWrapper->GetDocument());

 private:

  AutoRestore<bool> mIsDrawing;

  AutoPreserveAspectRatioOverride mPAR;

  AutoSVGTimeSetRestore mTime;

  Maybe<AutoSetRestoreSVGContextPaint> mContextPaint;

};

}  // namespace mozilla::image

#endif  // mozilla_image_AutoRestoreSVGState_h